Flexible ruler.



No.806,546. PATENTED'DE0.5,1905.

P. 0. LAW-LESS.

FLEXIBLE RULER. APYLIUATION FILED $22130, 1904.

' form of rubber or eqluivalent cord, as in Figs. I

- 1,, 2, 3, and 4, and e UNITED STATES PATENT OFFICE.

PHILIP CHARLES LAWLESS, HAMPSTEAD HEATH, LONDON, ENGLAND.

. FLEXIBLE RUL-ER.

Patented Dec. 5, 1905.

ruler has in course of time caused the indiarubber to separate from the metal or vulcanite; and the object of the present invention 7 is to provide a ruler wherein this separation shall be entirely prevented and which, as compared with flexible rulers hitherto used, shall be of cheaper construction. I attain this object by the arrangements illustrated in the accompanying drawings, in which- Figure 1 is a plan, and Fig. 2 an edge, view of one construction of the improved ruler,

both of these views being partly broken away.-

Figs. 3 and 4 are elevations of the respectively opposite ends of the ruler shown in Figs. 1 and 2.

Instead of the before-mentioned facings being in the form of flat sheet or strip rubber and riveted, cemented, or otherwisesecured to the ruler, as heretofore, they are in the y for their fixation upon their penetratin the ruler, such penetration entirely su erse ing the above-named means hitherto re ied upon.

In the arrangements shown in the drawings the rubber cord 1 is threaded alternately from one side to the other of the ruler 2 through series or rows of perforations 3 in the said ruler, the meeting ends 4: of the cord 1 being secured by being tightly squeezed through a single perforation. If des1red,the edge of this last-named perforation may be burred over or flanged, or the said perforation may have an eyelet secured therein to prevent the rubber cord 'being-chafed or cut by such edge.

The rubber cord 1 may be, either in a single piece, as shown in the drawin s, or in two or morepieces, the meeting en s being secured in the same manner as above described. By the before-described arrangement the india-rubber is securely held to the ruler and provides a very satisfactory support for holding the ruler out of contact with the surface to be ruled and allows the ruler to be freely bent backward and forward without disturbin the connection between the rubber and r er.

What 'I claim as my invention, and desire to secure by Letters Patent, is

In a-fiexible ruler, the combination of a flexible strip of resilient sheet material having'perforations distributed along its length,

and cord threaded alternately in opposite directions through the perforations.

' In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PHILIP CHARLES LAWLESS. 

